Isaac sheeck



I. SHERGK. Thrashing Machine.

(No Model.)

Nb.239,989 Patented-April 12,188L

mm how ATTORNEY UNITED STATES IsAAosHnnoK, on FREMONT, OHIO,

PATENT OFFICE.

ASSIGNOR TO HIMSELF, GEORGE E.

RAYMOND, OF SAME PLACE, AND WILLIAM F. JOBBINS, OF NEW YORK, N. Y.

THRASHlNG-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 239,989, dated April 12, 1881. Application filed March 8, 1881. (No model.)

ence being had to the accompanying drawings,

which form part of this specification.

My invention relates to an improvement in thrashing-machines, the object being to provide the cylinder and concave of a thrashing or hulling machine with any desired number of series of teeth constructed and arranged to be readily removed for repair or renewal.

My invention consists in certain features of construction and combinations of parts, as will hereinafter be described, and pointed out in the claims.

In, the accompanying drawings, Figure l is a plan view of a portion of aconcave embodying my invention. Fig. 2 is aview in side elevation of the same. Fig. 3 is an end-elevation view'of one of the concave bars, having a series of teeth secured thereto. Fig. lis a view in perspective of the same. Fig. 5 is a view in perspective of the bar, the teeth being-removed therefrom. Figs. 6, 7, and 8 are modifications.

A A represent the sides of the concave, each side being provided with a curved flange or I ledge, B, which serve to support the bars having teeth secured thereto. 0 is a barhavin g a notch,

a, formed in each end thereof, said notches being made to receive the flanges B, and thus support the bar.

D D are curved braces, secured by the opposite ends of the bar and below the notches a, said braces engaging the under side of the supportingflanges B B, thereby preventing the bar from rocking. E represents theteeth, each tooth being constructed with a flat seat, I), in its rear side, which fits against the front side of the bar, and with a shoulder, c, which rests upon the upper edge of the bar. The shank of the tooth is provided with a shoul; der, d, on its forward edge, near the lower end thereof.

F is a yoke, the rear edge of which is cut away at itscentral' portion for the reception are formed with downwardly-inclined lower edges, h. The teeth are placed against the front side of the bar, with their shoulders c rest-ing upon the upper edge thereof.

The yoke F is inserted in the loop 6 of the loop-bolt, and the screw-threaded shank of the loop-bolt then inscrtedin the opening through the bar. The not H then being tightened, the yoke serves to draw the flat seat b of the teeth snugly against the front surface of the bar, and also operates to impart an endwise'motion to the tooth, drawing its shoulder cagainst the upper edge of the bar and the lower side of the yoke against the shoulder on the lower portion of the tooth. This endwise draft is effected by means of the beveled upper surface, t', of the yoke engaging the inclined lower edges, h, of the lugs I. The yoke has a broad bearing in the shank of the tooth, to prevent the latter from twisting out of place. One side of the shank of the tooth bears against one side of the lug, while the shoulder j, formed on the end of the yoke. engages the opposite side of the tooth. It will thus be observed that the yoke and loop-bolt serve to secure two teeth to the single bar, and the teeth are prevented from accidental displacement.

Any desired number of teeth may be secured to a single bar, and should the teeth become worn or broken they may be readily removed for repair or renewal without disturbing the teeth on the other bars of the concave.

In Figs. 6 and 7 I have represented a modified form of construction, wherein the bar is provided with as many vertical V-shaped grooves K as there are teeth to be secured to the bar. The rear edge of the shank of the tooth is beveled ofi on opposite sides, as at K, allowing the rear edge of the shank to fit in the V-shaped groove K. A loop, I, on the loop-bolt L is placed over the shank of the tooth and the screwthreaded shank L of the loop-bolt inserted through the enlarged opening M in the bar, said opening being of the proper size to allow the loop 6 to be inserted therein. The tooth is provided with a shoulder, m, which rests upon the upper edge of the bar, and a shoulder, on, against which is seated the lower edge of loop Z. By tightening the nut on the shank of the loop-bolt the tooth is firmly secured in place.

Fig. 8 represents another modification. The tooth N is provided with an elongated slot, n, 10 through which is inserted the bar, and the tooth is then secured thereto by means of the wedges O and set-screw P.

Goncav'es so constructed are durable and efficient in use, may be manufactured at a I 5 small first cost, and when the teeth need to be repaired or replaced the operation may be quickly performed.

The cylinder of the machine may be provided with series of teeth, each series beingse- 2o cured to asingle bar, as hereinbefore described.

It is evident that slight changes in the construction and relative arrangement of parts might be made without departing from the spirit of my invention, and hence I would have it understood that I do not restrict myself to the exact construction and arrangement of parts shown and described; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters 0 Patent, is

1. The combination, with a single bar, of

teeth provided with shoulders on opposite edges of its shank, the shoulder on one edge resting upon the upper edge of the bar, anda yoke which engages with the shoulder on 5 the opposite edge of the shank and retains the tooth in place, substantially as set forth.

2. The combination, with the curved supporting-flanges on the sides of a concave, of wide bars having grooves in opposite ends 40 which fit said flanges, and with curved braces which engage the under side of the flanges and prevent the bars from rocking, substantially as described.

3. The combination, with the bar provided 5 with lugs having their lower edges inclined or beveled, of the teeth, a yoke, and a loop-bolt, substantially as set forth.

4. The combination, with the wide bar, having lugs on one side thereof, of loop-bolts and yokes, the latter provided each with a groove on its rear edge for the loop, and with shoulders on opposite ends for engaging the sides of the teeth, substantially as set forth.

In testimony that I claim the foregoing I 5 have hereunto set my hand and seal this 20th day of May, 1880. 9

ISAAC SHERGK. [L. s.]

Witnesses: M. E. TYLER,

J OSEPH BATIG, Jr. 

